Harness control



A. MOESSINGER HARNESS CONTROL April 15, 1952 Filed Dec. 11, 1946 2SHEETS-SHEET l 2 m I L T H L 2 2 2: j l

INVENTOR. 4.45527 fi/qanrmwse April 15, 1952 A. MOESSINGER 2,592,820

HARNESS CONTROL Filed Dec. 11, 1946 2 SHEETS-SHEET 2 =n LIE; 'I.'= r k5,

53 I 56 I 4D 49 r 4d 59 4! IN V EN TOR. /44 as? 7' flfaasjnvgse A7TOR/V5 X fatented Apr. 15, 1952 HARNESS CONTROL Albert Moessinger,Winterthur, Switzerland, assignor to Sulzer Freres, Societe Anonyme,Winterthur, Switzerland Application December 11, 1946, Serial No.715,515 In Switzerland December 12, 1945 16 Claims. I

The present invention relates to a loom for weaving and has for itsobject the provision of a harness operating mechanism which ispositi-Vely driven with the loom during normal weaving and whichincludes control means which permit operation of said mechanismindependently of the other parts of the loom, for example for producinga predetermined rest position of the harness when the loom is at rest.

It is an object of the present invention to provide means for closingand reopening the shed, in a simple manner, out of any operatingposition of the harness, whereby standstill periods due to failures, asfor instance caused by thread breaks, are reduced.

Further and other objects of the present invention will be hereinafterset forth in the accompanying specification and claims and shown in thedrawings which, by way of illustration, show what I now consider to bepreferred embodiments of my invention.

In the drawings:

Fig. 1 is a diagrammatic showing of the harness operating mechanismaccording to the invention in an operating position;

Fig. 2 illustrates the mechanism shown in Fig. l in a position where theheddles are at rest;

Fig. 3 diagrammatically shows a modified harness operating mechanismaccording to the invention, in an operating position;

Fig. 4 illustrates the device shown in Fig. 3 in a position where theheddles are at rest.

In the modification shown in Fig. 1, the harness operating mechanismcomprises motion initiating means having cams and 2, which act asdriving members and are keyed on a shaft 3 carried in bearings 3a andconnected to the loom drive. Cam cooperates with roller 4 and cam 2 withroller 5, the rollers being carried by a rocker member 8 having anextension The rocker 6 swings on a retractable shaft 8 which issupported by a hanger member 9 and rotatable in one end of link member Iwhich is swingable about an eccentric disk l2. Member 9 hangs on thestationary pin II. There is a second rocker 6' swingable on shaft 8 andhaving rollers 4' and cooperating with cams and 2 respectively, foroperating a second heddle frame 28'. In loomshaving more than twoharness frames, there is a corresponding number of'cams and rockers.

A control member 36 is pivotably connected to link member 9; thiscontrol member is operativelyconnected with an operating member of theloom drive, or with a clutch between said operating member and the shaft3. Member 3'6 is responsive to the position of the shaft 8 and actuatesmeans preventing operation of the loom when said shaft is displaced fromits normal operating position. Such means are conventional and thereforenot illustrated.

The eccentric disk [2 is provided with a journal l3 resting in a bearingM and is connected through a chain I5 and bevel gears IE to a clutch 1|through which it may be connected, for instance to the loom drive or toa hand drive.

A driving rod I1 is equipped at one end with a head l8 having aplurality of apertures l9 into which a pin at the end of the rocker 6may be .inserted. The other end of the driving rod I1 is pivotablyconnected, by means of a pin 20, to a bell-crank lever 2|, which iscarried by a stationary pin 22. The bell-crank lever 2| is connected bymeans of another driving rod 25 to a bell-crank lever 24 supported bystationary pin 23. The bell-crank levers 2| and'24 are individuallypivotably connected to bars 21, which extend through guides 21a andareconnected to the heddle frame 28. The heddle frame has upper and lowerbars 29 on which the heddles 30 provided with eyes 3| are mounted. Thewarp threads 32 extend through the eyes 3|.

Rocker 6' actuates bell-cranks 2| and 24' which are interconnected byrod 25'. The bellcranks 2| and 24' actuate the frame 29' for heddles 38'having eyes 3| by similar means as those by which bell-cranks 2| '24actuate the heddle frame 28.

During normal weaving operation the shaft 3, driven by the loom drive,rotates with the cams and 2 in the direction of arrow 33. Subsequent tothe position shown in Fig. 1 the cam 2 presses on the roller 5 and movesthe rocker 6 into its right end position 6a which is the positionoccupied by the actuating means for the second heddle frame 28' Themechanism 2|, 25, 24, 26 brings the frame 28 into its lowest position.When the rocker is in the end position 6a, the cam l presses on theroller 4, causing the rocker 6 to move counter-clockwise, whereby theframe 28 is pushed into its upper end position. The continued rotationof the cams l and 2 imparts a reciprocating movement to the frame 28. Incase of an irregularity, for instance if a warp thread 32 breaks, theloom is brought to rest in a known manner. The cams 2 and the heddleframe actuated by them come to rest simultaneously. For removing thecause of the standstill, for instance for inserting a new warp thread32, it is desirable that the shed be closed; this 3 is accomplished bymoving all heddle frames into positions in the middle between the upperand lower end positions.

As shown in Fig. 2 the harness frames 28, 28, etc., are brought from anyoperating position into the position of rest corresponding to thepreferably closed shed, which, for instance, may be the middle positionof the heddle frame, by engagement of clutch mechanism ii whereby theeccentric disc l2 which is connected to the loom drive is operated bythe chain l5 which turns the eccentric disc i2 through 180 into positioniZa. Thereby member H] is moved into position lilo through a distancecorresponding to the double eccentricity. As soon as this new positionhas been reached, mechanism H automatically interrupts the drive ofchain 15. Clutch mechanism i! may be of the type disclosed in Fig. '7 ofmy co-pending application Ser. No. 612 ,864,'filed August 27, 1945, andwhich is also illustrated in Figs. '9 to 11, re-numbered 6 to 8, of myapplication Ser. No. 767,418., filed August 8, 1947, under the Boy kinact. It disengages automatically after rotation'through a predeterminedangle. The shaft 8 is brought by the motion of the eccentric l2 into theposition 8a, and therod 9 into the positioned. Thereby member '35 isdisplaced into the position a. and prevents operation of the loom or ofshaft 3 by means not shown. The rocker Bis drawn to the arresting orabutment mean's34 and 35 and rests in position 5!), whereby' the harnessframe is held in a position corresponding'to that in which the shed isclosed. The rollers 4, '5 are thereby removed from the cams into thepositions 4a and 5a.

"When the weaving defect has been removed,

the eccentricdi'sc I2 is brought back into the operating position ofFig. l and the rollers 4 and 5 contact the cams l and 2 again and movethe frame 28 into the position which it had when the loom was stopped.The control linkage 3'5 is brought back simultaneously into its normalposition, and normal weaving can be resumed by 'econ'necting the shaft 3to the loom drive.

Instead of driving each individual frame 28 of a loom by means ofindividual pairs of cams and two rollers co-operating therewith, otherdrive mechanisms may be used, as long as they are positive.

"In the harness frame drive shown in Figs. 3 and 4 motion initiatingmeans comprising a driving rod 55 is pivotably connected to a rocker ormotion transmitting member 55 by means of a pin 55. Rod 55 is driven byan eccentric 5| or by a 'dobby. The rocker 56 is equipped with a pivotpin-3"! held pivotably between two bearing blocks 58 forming aretractable support for the fulcrum 31. These blocks are guided betweenguides 38, and "each of them is connected to a system of levels, each ofwhich is arranged in mirror image fashion with respect to the other.Each block 58 is attached pivotably 'to an operating bar 59 swingablyconnected by a pivot pin 49 to a rod '42 and to the shorter arm of abell-crank lever A! which is supported on a stationary pin :34. Thelonger arms of the bell-crank levers M are individuallypivotab'lyconnectedto cranks 45, a throughlinks 43. The cranks 55, 55awhich are set'at an angle of 180 are fixed to a shaft 58, on which. atoothed wheel s! is mounted. The toothed wheels! is connected through achain 15 and a clutch, as in the embodiment of the invention'showninFig. l, to a'drive, for instance the loom drive or a hand drive.

The rods are connected individually through pivot pins 38 to rods 49 and59. The rods 49 Looms are usually fitted .with several harness framesand several rockers 56 may be controlled by two bearing blocks 58extending over a suitable length and at right angles to the plane of thedrawing and may cooperate with sliding shoes 52 common to all rockers.

During normal operation of the loom the lever systems operating theheddle frames are in the position shown in Fig. 3. The pin 31 is heldbetween the two bearing blocks 58. The sliding shoes52 are so faiapartthat the rocker 56 can make the required rocking movements.

If it is desired to place the heddle frames 28 into their middlepositions corresponding to a closed shed, for example for correctingweaving defects, such as caused by a broken warp thread, the loom isbrought to rest by means not described because they do not form part ofthe present invention, whereby the heddle frames stop in whateveroperating position they are at the moment the loom is stopped. Forforminga closed shed the chain I5 is moved to rotate the cranks 45 and45a through 180 into the position shown in Fig. a. This causesdisplacement of the lever systems into the positions shown inFig. 4. Thetwo bearing blocks 58 are thereby'movedoutward and the two sliding shoes52 inward-and the driving bar 54 is brought and arrested in its middleposition which corresponds to the position of the closed shed. In doingthis it does not matter what position is takenupby the bar55 andtheeccentric or the dobby '5'l'sincethe rocking lever can assume anyposition where its pin 55 is in middle position defined by the closed-insliding shoes 52.

After the weaving defect has-beenremoved, the lever systems are broughtback into the positions shown in Fig. '4 by rotating the cranks 45and'45a through The sliding -shoes 52 are thereby brought intotheiroutermost positions and-the bearing blocks -58 are brought togetherand hold the pin 31in its middle position. The rockerr56 swings'aboutthe pivot pin-3l-and, actuated-by the driving bar-55, forces the'heddleframes,- by meansof the driving bar-54 intothepositionjcorresponding tothe position of the'eccentric 51 and normal weaving operations areresumed.

While I believe the above described embodiments of my invention to bepreferred embodiments, I wishit to be understood that I do'not desire tobe limited to the exact detailstof design and construction shown anddescribed, for-obvious modifications will occur -to a person skilled inthe art. 6

I claim: 1

1. In a loom for weaving, a'heddle framepa heddle frame operatingmechanism'comprising motion initiatin means, a rocker'member having adisplaceable fulcrum and being connected with and adapted to be rockedby said initiating meansand being connected-with and operating saidheddle frame, and fulcrum displacing means connected with c said fulcrumand 1 adapted :to

temporarily afford displacement .of .said: fulcrum and to render theeffect of said initiating means on said rocker member ineffective. I

2. In a loom for weaving, a heddle frame, a heddle frame operatingmechanism comprising motion initiating means, a rocker member having adisplaceable fulcrum and being adapted to be engaged and rocked by saidinitiating means and connected with and operating said heddle frame,fulcrum displacing means connected with said fulcrum and adapted toafford temporary displacement of said fulcrum and separation of saidrocker member from said initiating means, and abutment means adapted toabuttingly engage said rocker member and hold it in a positioncorresponding to a predetermined position of said frame when said rockermember is separated from said initiating means.

3. In a loom for weaving, a heddle frame operating mechanism comprisingheddle frame operating means, motion initiating means, rocker membersconnected with and adapted to be rocked by said initiating means andeach having an end portion comprising pivot means swingably andindividually connected with said operating means and having each anotherend portion comprising a rocker fulcrum, displaceable fulcrum engagingmeans disposed adjacent said other end portions, displaceablepositioning means disposed adjacent said first end portions, anddisplacing means interconnecting said positioning means and saidengaging means and adapted to position, temporarily, said first endportions in a predetermined position and simultaneously release saidengaging means and affording lateral movement of said other endportions.

4. In a loom for weaving, a heddle frame, a heddle frame operatingmechanism comprising motion initiating means, a rocker member having afulcrum displaceable transversely to the rocking axis and being rockedby said initiating means and connected with and operating said heddleframe, and fulcrum displacing means connected with said fulcrum andcomprising crank means affording, in one dead center position, placementof said fulcrum where said initiating means are fully effective on saidrocker member as to the operation of said heddle frame and, in the otherdead center position, placement of said fulcrum where said initiatingmeans are ineffective on said rocker member as to the operation of saidframe and the latter is in a predetermined rest position.

5. In a loom for weaving, a heddle frame, a heddle frame operatingmechanism comprising motion initiating means having cam means, a rockermember having a displaceable fulcrum and being connected with andoperating said heddle frame and having rollers adapted to engage saidcam means, and fulcrum displacing means connected with said fulcrum andadapted to afford temporary displacement of said fulcrum anddisengagement of said rollers from said cam means.

6. In a loom for weaving, a heddle frame operating mechanism comprisingheddle frame operating means, motion initiating means, a rocker memberhaving a displaceable fulcrum and being adapted to be engaged and rockedby said initiating means, fulcrum displacing means connected with saidfulcrum and adapted to afford temporary displacement of said fulcrum andseparation of said rocker member from said initiating means, said frameoperating means comprising a connecting rod member, and connecting meansswingably interconnecting said rocker member and said rod member andbeing displaceable on the latter.

7. In a loom for weaving, a source of power, heddle frames, a heddleframe operating mechanism comprising actuating members driven by saidsource, intermediary members individually positively engaged andoperated by said actuating members and individually connected with andpositively operating said'frames, control means positively engaging saidintermediary members and adapted to render same ineffective as to theoperation of said frames, and a selfdisengaging clutch means interposedbetween said source and said control means and temporarily connectingsaid control means with said source.

8. In a loom for weaving, a heddle frame, a heddle frame operatingmechanism comprising a movable driving member, a motion transmittingmember connected with said driving member and with the heddle frame, anormally stationary support for said motion transmitting member to whichit is pivotally secured, a releasable holding mechanism for said supportfor normally holding the support stationary, and when released, forretracting the support, whereby the motion transmitting member isrendered ineffective. r 1

9. In a loom for weaving, a heddle frame, a heddle frame operatingmechanism comprising a movable driving member, a motion transmittingmember connected with said heddle frame and operatively connected tosaid driving member, anormally stationary support for said motiontransmitting member towhich it is pivotally secured, and releasableholding means for said support for normally holding the supportstationary, and when released for retracting the support whereby themotion transmitting memher is disconnected from the driving member.

10. In a loom for weaving, a heddle frame, a heddle frame operatingmechanism comprising a movable driving member, a motion transmittingmember connected with said driving member and with the heddle frame, anormally stationary support for said motion transmitting member to whichit is pivotally secured, a releasable holding mechanism for said supportfor normally maintaining it stationary, and when released, forretracting the support, a pair of abutments for contacting two surfacesof said motion transmitting member to hold it stationary when the pivotsupport is released from its normal stationary position, and a linkageconnected to the support holding mechanism and to the abutments forsimultaneously retracting the support from its normally stationaryposition and producing relative movement toward each other of saidabutments for bringing them in contact with said motion transmittingmember whereby the heddle frame is held stationary.

11. In a loom for,weaving, a heddle frame; stationary arresting means; aheddle frame operating mechanism comprising motion initiating means,motion transmitting means connected with said frame and comprising alever alternatively engageable by said initiating means and by saidarresting means, a shaft displaceable transversely to its longitudinalaxis and swingably supporting said lever, and control means comprising adisplacing member connected with said shaft for placing said shaft andsaid lever for engaging the latter either with said initiating means fornormal operation o a d ram or mih saida s ne e n -fir e tin sa d m ch ns an sai rame in a predetermined position.

:12 I a lo m Q W a n a u al f in dle frames-aheddle frame operatingmechanism comprising motion initiating means, individual ot o t a timean d v du ll onnected with said frames and individually comprising alever engageable by said initiating means, a shaft displaceabletransversely to its lon itud nal axi a s-swi e up o t g sa d levers,ancicom means comprising a d sp ac ingmember connected with said shaftfor alternativeiy p acin sa d ft and v a l ve s e engaging the latterwith said initia in -means for; normal operation of-said frames or fordisengaging said levers from said initiating means.

:l al czm o e r ng a l ra Q i c s l frames. 1 hedd e fram e t n m c aismc isin motion n ia n m ans i dividual motion transmitting meansindividually connected with said frames and individually comprising alever engageable by said initiating means, stationary arresting meanscommon to all levers and engageable thereby, ashaft displaceabletransversely to its longitudinal axis ndswin ab y. u p t n sa v rs ndt-rol means comprising adisplacing m ember connected with said shaft foralternatively placing said-shaft and said levers for engaging the lattereither with said initiating means for normal operation of said frames orwith-said-arresting means for arresting-said mechanism and said framesin a predetermined position.

lfL'IIl a looinfor weaying, a plurality of heddle frames, a;hedd1e frameoperating mechanis m isi mo in a n m n dividual motiQ transmitting meansindividually connected with said frames and individually comprising a--;member engageable by said initiating means, arresting means common toall sa dm m and .ensae ab eb a sha n vqtal .su nqr in s member a en u usupport for saidshaft rendering the shaft displaceable transversely toits longitudinal axis, and displacing means comprising an eccentric anda link. member interconnecting the eccentric with said shaft forplacing, upon rotation of said eccentric, said shaft and said membersfor engaging the latter either .vvith said initiating means for normaloperation of said frames or with said arresting means for arresting saidmechanism and said frames in a predetermined position.

1.5. In a loom for weaving, a source of power, a heddle frame, a heddleframe operating mechanism comprising motion initiating means connectedto and operated by said source, motion transmitting means connected withsaid heddle frame and comprising a member engageablewith and normallyengaged by said initiatingmeans, a retractable support for said member,retracting means connected with said support for retracting said supportand disengagv ing said member from said initiating means, and operatingmeans connected with said retracting means and with and operated by saidsource.

16. In a loom for Weaving as set forth in claim 15, said operating meanscomprising clutch means for connecting and disconnecting said retractingmeans to and from said source.

ALBERT MOESSINGEB.

REFERENCES CITED The following references are of record inthe file ofthis patent:

UNITED STATES PATENTS Number Name Date 191,317 Crompton May 29, 1877454,135 Hutchins June 16, 1891 550,450 C'avanaugh Nov. 26, 18951,759,673 Thatcher May 20, 19 30

